Production efficacy of roughage as a criterion of effective nutrition of cattle

agricultura agriculture aliment pour animaux alimentation alimentation des animaux alimentos concentrados alimentos para animales animal animal domestique animal feeding animal husbandry methods animal pour cuirs et peaux animal production animales animales de carne animals artiodactyla artiodactyle augmentation de rendement aumento del rendimiento beef cattle bovidae bovide bovin bovin de boucherie bovin laitier bovine bovines breeding breeding aims cattle concentrates costos costs crianza en gran escala dairy cattle domestic animals economia economics economie feeding feeds forraje grosero fourrage grossier gain de poids ganado ganado bovino ganado de carne ganado de leche ganancia de peso large-scale husbandry livestock mammals meat animals methode methods milk production nutrition objetivo de mejoramiento production production animale roughage rumiante ruminant ruminants vertebrados vertebrates vertebre weight gain zootechnie zootechny zootecnia